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URLComponents.urlはnilです

URLComponentsを使用してURLを作成しようとしています。

ただし、コンポーネントのurlプロパティにアクセスすると、nilになります。

例...

var urlComponents = URLComponents(string: "http://google.com")!
urlComponents.path = "auth/login"

その後、私は...

print(urlComponents)

出力...

scheme: http Host: google.com path: auth/login
  - scheme : "http"
  - Host : "google.com"
  - path : "auth/login"

しかしその後...

print(urlComponents.url)

nilを出力します。

私はこれで何か悪いことをしていますか？これらすべてから完全な形式のURLを取得するにはどうすればよいですか？ありがとう

iosswiftnsurlnsurlcomponents
30
Fogmeister

pathパラメータの文字列は/で始まる必要があるようです。

したがって、"auth/login"を"/auth/login"に変更してください。

69
user28434

TL; DR

WebのURL（http://example.com/pathなど）を作成する場合は、/を含めます。これは、次のテンプレートを使用しているためです。

{scheme}://{user}:{password}@{Host}:{port}{path}?{query}#{fragment}

Web以外のURL（mailto:[email protected]など）を作成する場合は、/を含めないでください。次のテンプレートが使用されているためです。

{scheme}:{path}?{query}%23{fragment}

これが発生している理由を明確にするために、 URLComponents の実際のテンプレートは次のとおりです。

{scheme}://{user}:{password}@{Host}:{port}{path}?{query}#{fragment}

2つのコンポーネント間に句読点（://、:、@、:、?、#）があることに注意してくださいexcept（{port}および{path}の場合）。

そのため、{path}の前に句読点（/）を付ける必要があります。そうしないと、無効なURLが生成されます。

あなたのケースではあなたが使用する必要があります：

urlComponents.path = "/auth/login"

URLComponentsの一般的ではないフィールドを省略しても、同じ問題が発生することに注意してください。

{scheme}://{Host}{path}?{query}#{fragment}

この場合も、{Host}と{path}が隣接しており、2つを区切る句読点がないことに注意してください。

Appleが{port}の前に句読点を含めなかったのはなぜか疑問に思われるかもしれません。URLComponentsを使用して RFC 3986 仕様、Web URLだけでなく、たとえばhttp://www.example.com/fooを簡単に生成できますが、mailto:[email protected]という形式のURLを簡単に生成できます。

URLComponentsは、{scheme}が省略されている場合に{path}と{Host}の間の区切り文字を変更することでこれを可能にします。

{scheme}:{path}?{query}%23{fragment}

したがって、mailtoリンクを作成する場合、実際にはパスに/を含めないとします。

urlComponents.scheme = "mailto"
urlComponents.path = "[email protected]"
// urlComponents.url!.absoluteString == "mailto:[email protected]"

URLComponentsのプロパティをURLのプロパティと比較すると、もう少し洞察が得られます（そして少し不整合が明らかになります）。

let string = "scheme://user:password@Host:123/path/path/path/?query#fragment"
let urlComponents = URLComponents(string: string)!
let url = URL(string: string)!

// these are expected
url.absoluteString == urlComponents.url!.absoluteString
url.scheme == urlComponents.scheme
url.user == urlComponents.user
url.password == urlComponents.password
url.Host == urlComponents.Host
url.port == urlComponents.port
url.query == urlComponents.query
url.fragment == urlComponents.fragment

// this is unexpected. They should have been equal to each other
url.path != urlComponents.path

url.path == "/path/path/path"
urlComponents.path == "/path/path/path/"

url.pathComponents == ["/", "path", "path", "path"]
url.lastPathComponent == "path"

注意すべき2つの点：

  • url.pathの接尾辞には/がありません。
  • url.pathComponents[0]は、URLの最初の/です。

テンプレートの完全なリストについては、次のコードを使用できます。

let componentsCount = Double(8)
let iterations = Int(pow(2, componentsCount))

for i in 0..<iterations {
  var urlComponents = URLComponents()
  var key = ""
  if i & 0b10000000 > 0 { urlComponents.scheme = "scheme"; key += "s" } else { key += " " }
  if i & 0b01000000 > 0 { urlComponents.user = "user"; key += "u" } else { key += " " }
  if i & 0b00100000 > 0 { urlComponents.password = "password"; key += "w" } else { key += " " }
  if i & 0b00010000 > 0 { urlComponents.Host = "Host"; key += "h" } else { key += " " }
  if i & 0b00001000 > 0 { urlComponents.port = 123; key += "r" } else { key += " " }
  if i & 0b00000100 > 0 { urlComponents.path = "/path"; key += "p" } else { key += " " }
  if i & 0b00000010 > 0 { urlComponents.query = "query"; key += "q" } else { key += " " }
  if i & 0b00000001 > 0 { urlComponents.fragment = "fragment"; key += "f" } else { key += " " }

  if let url = urlComponents.url?.absoluteString {
    print("[\(key)] \(url)")
  } else {
    print("[\(key)] ------- nil --------")
  }
}

次の出力が生成されます。

[        ] 
[       f] #fragment
[      q ] ?query
[      qf] ?query#fragment
[     p  ] /path
[     p f] /path#fragment
[     pq ] /path?query
[     pqf] /path?query#fragment
[    r   ] //:123
[    r  f] //:123#fragment
[    r q ] //:123?query
[    r qf] //:123?query#fragment
[    rp  ] //:123/path
[    rp f] //:123/path#fragment
[    rpq ] //:123/path?query
[    rpqf] //:123/path?query#fragment
[   h    ] //Host
[   h   f] //Host#fragment
[   h  q ] //host?query
[   h  qf] //host?query#fragment
[   h p  ] //Host/path
[   h p f] //Host/path#fragment
[   h pq ] //Host/path?query
[   h pqf] //Host/path?query#fragment
[   hr   ] //Host:123
[   hr  f] //Host:123#fragment
[   hr q ] //Host:123?query
[   hr qf] //Host:123?query#fragment
[   hrp  ] //Host:123/path
[   hrp f] //Host:123/path#fragment
[   hrpq ] //Host:123/path?query
[   hrpqf] //Host:123/path?query#fragment
[  w     ] //:password@
[  w    f] //:password@#fragment
[  w   q ] //:password@?query
[  w   qf] //:password@?query#fragment
[  w  p  ] //:password@/path
[  w  p f] //:password@/path#fragment
[  w  pq ] //:password@/path?query
[  w  pqf] //:password@/path?query#fragment
[  w r   ] //:password@:123
[  w r  f] //:password@:123#fragment
[  w r q ] //:password@:123?query
[  w r qf] //:password@:123?query#fragment
[  w rp  ] //:password@:123/path
[  w rp f] //:password@:123/path#fragment
[  w rpq ] //:password@:123/path?query
[  w rpqf] //:password@:123/path?query#fragment
[  wh    ] //:password@Host
[  wh   f] //:password@Host#fragment
[  wh  q ] //:password@host?query
[  wh  qf] //:password@host?query#fragment
[  wh p  ] //:password@Host/path
[  wh p f] //:password@Host/path#fragment
[  wh pq ] //:password@Host/path?query
[  wh pqf] //:password@Host/path?query#fragment
[  whr   ] //:password@Host:123
[  whr  f] //:password@Host:123#fragment
[  whr q ] //:password@Host:123?query
[  whr qf] //:password@Host:123?query#fragment
[  whrp  ] //:password@Host:123/path
[  whrp f] //:password@Host:123/path#fragment
[  whrpq ] //:password@Host:123/path?query
[  whrpqf] //:password@Host:123/path?query#fragment
[ u      ] //user@
[ u     f] //user@#fragment
[ u    q ] //user@?query
[ u    qf] //user@?query#fragment
[ u   p  ] //user@/path
[ u   p f] //user@/path#fragment
[ u   pq ] //user@/path?query
[ u   pqf] //user@/path?query#fragment
[ u  r   ] //user@:123
[ u  r  f] //user@:123#fragment
[ u  r q ] //user@:123?query
[ u  r qf] //user@:123?query#fragment
[ u  rp  ] //user@:123/path
[ u  rp f] //user@:123/path#fragment
[ u  rpq ] //user@:123/path?query
[ u  rpqf] //user@:123/path?query#fragment
[ u h    ] //user@Host
[ u h   f] //user@Host#fragment
[ u h  q ] //user@host?query
[ u h  qf] //user@host?query#fragment
[ u h p  ] //user@Host/path
[ u h p f] //user@Host/path#fragment
[ u h pq ] //user@Host/path?query
[ u h pqf] //user@Host/path?query#fragment
[ u hr   ] //user@Host:123
[ u hr  f] //user@Host:123#fragment
[ u hr q ] //user@Host:123?query
[ u hr qf] //user@Host:123?query#fragment
[ u hrp  ] //user@Host:123/path
[ u hrp f] //user@Host:123/path#fragment
[ u hrpq ] //user@Host:123/path?query
[ u hrpqf] //user@Host:123/path?query#fragment
[ uw     ] //user:password@
[ uw    f] //user:password@#fragment
[ uw   q ] //user:password@?query
[ uw   qf] //user:password@?query#fragment
[ uw  p  ] //user:password@/path
[ uw  p f] //user:password@/path#fragment
[ uw  pq ] //user:password@/path?query
[ uw  pqf] //user:password@/path?query#fragment
[ uw r   ] //user:password@:123
[ uw r  f] //user:password@:123#fragment
[ uw r q ] //user:password@:123?query
[ uw r qf] //user:password@:123?query#fragment
[ uw rp  ] //user:password@:123/path
[ uw rp f] //user:password@:123/path#fragment
[ uw rpq ] //user:password@:123/path?query
[ uw rpqf] //user:password@:123/path?query#fragment
[ uwh    ] //user:password@Host
[ uwh   f] //user:password@Host#fragment
[ uwh  q ] //user:password@host?query
[ uwh  qf] //user:password@host?query#fragment
[ uwh p  ] //user:password@Host/path
[ uwh p f] //user:password@Host/path#fragment
[ uwh pq ] //user:password@Host/path?query
[ uwh pqf] //user:password@Host/path?query#fragment
[ uwhr   ] //user:password@Host:123
[ uwhr  f] //user:password@Host:123#fragment
[ uwhr q ] //user:password@Host:123?query
[ uwhr qf] //user:password@Host:123?query#fragment
[ uwhrp  ] //user:password@Host:123/path
[ uwhrp f] //user:password@Host:123/path#fragment
[ uwhrpq ] //user:password@Host:123/path?query
[ uwhrpqf] //user:password@Host:123/path?query#fragment
[s       ] scheme:
[s      f] scheme:%23fragment
[s     q ] scheme:?query
[s     qf] scheme:?query%23fragment
[s    p  ] scheme:/path
[s    p f] scheme:/path#fragment
[s    pq ] scheme:/path?query
[s    pqf] scheme:/path?query#fragment
[s   r   ] scheme://:123
[s   r  f] scheme://:123#fragment
[s   r q ] scheme://:123?query
[s   r qf] scheme://:123?query#fragment
[s   rp  ] scheme://:123/path
[s   rp f] scheme://:123/path#fragment
[s   rpq ] scheme://:123/path?query
[s   rpqf] scheme://:123/path?query#fragment
[s  h    ] scheme://Host
[s  h   f] scheme://Host#fragment
[s  h  q ] scheme://host?query
[s  h  qf] scheme://host?query#fragment
[s  h p  ] scheme://Host/path
[s  h p f] scheme://Host/path#fragment
[s  h pq ] scheme://Host/path?query
[s  h pqf] scheme://Host/path?query#fragment
[s  hr   ] scheme://Host:123
[s  hr  f] scheme://Host:123#fragment
[s  hr q ] scheme://Host:123?query
[s  hr qf] scheme://Host:123?query#fragment
[s  hrp  ] scheme://Host:123/path
[s  hrp f] scheme://Host:123/path#fragment
[s  hrpq ] scheme://Host:123/path?query
[s  hrpqf] scheme://Host:123/path?query#fragment
[s w     ] scheme://:password@
[s w    f] scheme://:password@#fragment
[s w   q ] scheme://:password@?query
[s w   qf] scheme://:password@?query#fragment
[s w  p  ] scheme://:password@/path
[s w  p f] scheme://:password@/path#fragment
[s w  pq ] scheme://:password@/path?query
[s w  pqf] scheme://:password@/path?query#fragment
[s w r   ] scheme://:password@:123
[s w r  f] scheme://:password@:123#fragment
[s w r q ] scheme://:password@:123?query
[s w r qf] scheme://:password@:123?query#fragment
[s w rp  ] scheme://:password@:123/path
[s w rp f] scheme://:password@:123/path#fragment
[s w rpq ] scheme://:password@:123/path?query
[s w rpqf] scheme://:password@:123/path?query#fragment
[s wh    ] scheme://:password@Host
[s wh   f] scheme://:password@Host#fragment
[s wh  q ] scheme://:password@host?query
[s wh  qf] scheme://:password@host?query#fragment
[s wh p  ] scheme://:password@Host/path
[s wh p f] scheme://:password@Host/path#fragment
[s wh pq ] scheme://:password@Host/path?query
[s wh pqf] scheme://:password@Host/path?query#fragment
[s whr   ] scheme://:password@Host:123
[s whr  f] scheme://:password@Host:123#fragment
[s whr q ] scheme://:password@Host:123?query
[s whr qf] scheme://:password@Host:123?query#fragment
[s whrp  ] scheme://:password@Host:123/path
[s whrp f] scheme://:password@Host:123/path#fragment
[s whrpq ] scheme://:password@Host:123/path?query
[s whrpqf] scheme://:password@Host:123/path?query#fragment
[su      ] scheme://user@
[su     f] scheme://user@#fragment
[su    q ] scheme://user@?query
[su    qf] scheme://user@?query#fragment
[su   p  ] scheme://user@/path
[su   p f] scheme://user@/path#fragment
[su   pq ] scheme://user@/path?query
[su   pqf] scheme://user@/path?query#fragment
[su  r   ] scheme://user@:123
[su  r  f] scheme://user@:123#fragment
[su  r q ] scheme://user@:123?query
[su  r qf] scheme://user@:123?query#fragment
[su  rp  ] scheme://user@:123/path
[su  rp f] scheme://user@:123/path#fragment
[su  rpq ] scheme://user@:123/path?query
[su  rpqf] scheme://user@:123/path?query#fragment
[su h    ] scheme://user@Host
[su h   f] scheme://user@Host#fragment
[su h  q ] scheme://user@host?query
[su h  qf] scheme://user@host?query#fragment
[su h p  ] scheme://user@Host/path
[su h p f] scheme://user@Host/path#fragment
[su h pq ] scheme://user@Host/path?query
[su h pqf] scheme://user@Host/path?query#fragment
[su hr   ] scheme://user@Host:123
[su hr  f] scheme://user@Host:123#fragment
[su hr q ] scheme://user@Host:123?query
[su hr qf] scheme://user@Host:123?query#fragment
[su hrp  ] scheme://user@Host:123/path
[su hrp f] scheme://user@Host:123/path#fragment
[su hrpq ] scheme://user@Host:123/path?query
[su hrpqf] scheme://user@Host:123/path?query#fragment
[suw     ] scheme://user:password@
[suw    f] scheme://user:password@#fragment
[suw   q ] scheme://user:password@?query
[suw   qf] scheme://user:password@?query#fragment
[suw  p  ] scheme://user:password@/path
[suw  p f] scheme://user:password@/path#fragment
[suw  pq ] scheme://user:password@/path?query
[suw  pqf] scheme://user:password@/path?query#fragment
[suw r   ] scheme://user:password@:123
[suw r  f] scheme://user:password@:123#fragment
[suw r q ] scheme://user:password@:123?query
[suw r qf] scheme://user:password@:123?query#fragment
[suw rp  ] scheme://user:password@:123/path
[suw rp f] scheme://user:password@:123/path#fragment
[suw rpq ] scheme://user:password@:123/path?query
[suw rpqf] scheme://user:password@:123/path?query#fragment
[suwh    ] scheme://user:password@Host
[suwh   f] scheme://user:password@Host#fragment
[suwh  q ] scheme://user:password@host?query
[suwh  qf] scheme://user:password@host?query#fragment
[suwh p  ] scheme://user:password@Host/path
[suwh p f] scheme://user:password@Host/path#fragment
[suwh pq ] scheme://user:password@Host/path?query
[suwh pqf] scheme://user:password@Host/path?query#fragment
[suwhr   ] scheme://user:password@Host:123
[suwhr  f] scheme://user:password@Host:123#fragment
[suwhr q ] scheme://user:password@Host:123?query
[suwhr qf] scheme://user:password@Host:123?query#fragment
[suwhrp  ] scheme://user:password@Host:123/path
[suwhrp f] scheme://user:password@Host:123/path#fragment
[suwhrpq ] scheme://user:password@Host:123/path?query
[suwhrpqf] scheme://user:password@Host:123/path?query#fragment

これらのどれもnilではないことに注意してください。ただし、urlComponents.path = "/path"をurlComponents.path = "path"に変更すると、完全に異なるテンプレートセットが得られます。

[        ] 
[       f] #fragment
[      q ] ?query
[      qf] ?query#fragment
[     p  ] path
[     p f] path#fragment
[     pq ] path?query
[     pqf] path?query#fragment
[    r   ] //:123
[    r  f] //:123#fragment
[    r q ] //:123?query
[    r qf] //:123?query#fragment
[    rp  ] ------- nil --------
[    rp f] ------- nil --------
[    rpq ] ------- nil --------
[    rpqf] ------- nil --------
[   h    ] //Host
[   h   f] //Host#fragment
[   h  q ] //host?query
[   h  qf] //host?query#fragment
[   h p  ] ------- nil --------
[   h p f] ------- nil --------
[   h pq ] ------- nil --------
[   h pqf] ------- nil --------
[   hr   ] //Host:123
[   hr  f] //Host:123#fragment
[   hr q ] //Host:123?query
[   hr qf] //Host:123?query#fragment
[   hrp  ] ------- nil --------
[   hrp f] ------- nil --------
[   hrpq ] ------- nil --------
[   hrpqf] ------- nil --------
[  w     ] //:password@
[  w    f] //:password@#fragment
[  w   q ] //:password@?query
[  w   qf] //:password@?query#fragment
[  w  p  ] ------- nil --------
[  w  p f] ------- nil --------
[  w  pq ] ------- nil --------
[  w  pqf] ------- nil --------
[  w r   ] //:password@:123
[  w r  f] //:password@:123#fragment
[  w r q ] //:password@:123?query
[  w r qf] //:password@:123?query#fragment
[  w rp  ] ------- nil --------
[  w rp f] ------- nil --------
[  w rpq ] ------- nil --------
[  w rpqf] ------- nil --------
[  wh    ] //:password@Host
[  wh   f] //:password@Host#fragment
[  wh  q ] //:password@host?query
[  wh  qf] //:password@host?query#fragment
[  wh p  ] ------- nil --------
[  wh p f] ------- nil --------
[  wh pq ] ------- nil --------
[  wh pqf] ------- nil --------
[  whr   ] //:password@Host:123
[  whr  f] //:password@Host:123#fragment
[  whr q ] //:password@Host:123?query
[  whr qf] //:password@Host:123?query#fragment
[  whrp  ] ------- nil --------
[  whrp f] ------- nil --------
[  whrpq ] ------- nil --------
[  whrpqf] ------- nil --------
[ u      ] //user@
[ u     f] //user@#fragment
[ u    q ] //user@?query
[ u    qf] //user@?query#fragment
[ u   p  ] ------- nil --------
[ u   p f] ------- nil --------
[ u   pq ] ------- nil --------
[ u   pqf] ------- nil --------
[ u  r   ] //user@:123
[ u  r  f] //user@:123#fragment
[ u  r q ] //user@:123?query
[ u  r qf] //user@:123?query#fragment
[ u  rp  ] ------- nil --------
[ u  rp f] ------- nil --------
[ u  rpq ] ------- nil --------
[ u  rpqf] ------- nil --------
[ u h    ] //user@Host
[ u h   f] //user@Host#fragment
[ u h  q ] //user@host?query
[ u h  qf] //user@host?query#fragment
[ u h p  ] ------- nil --------
[ u h p f] ------- nil --------
[ u h pq ] ------- nil --------
[ u h pqf] ------- nil --------
[ u hr   ] //user@Host:123
[ u hr  f] //user@Host:123#fragment
[ u hr q ] //user@Host:123?query
[ u hr qf] //user@Host:123?query#fragment
[ u hrp  ] ------- nil --------
[ u hrp f] ------- nil --------
[ u hrpq ] ------- nil --------
[ u hrpqf] ------- nil --------
[ uw     ] //user:password@
[ uw    f] //user:password@#fragment
[ uw   q ] //user:password@?query
[ uw   qf] //user:password@?query#fragment
[ uw  p  ] ------- nil --------
[ uw  p f] ------- nil --------
[ uw  pq ] ------- nil --------
[ uw  pqf] ------- nil --------
[ uw r   ] //user:password@:123
[ uw r  f] //user:password@:123#fragment
[ uw r q ] //user:password@:123?query
[ uw r qf] //user:password@:123?query#fragment
[ uw rp  ] ------- nil --------
[ uw rp f] ------- nil --------
[ uw rpq ] ------- nil --------
[ uw rpqf] ------- nil --------
[ uwh    ] //user:password@Host
[ uwh   f] //user:password@Host#fragment
[ uwh  q ] //user:password@host?query
[ uwh  qf] //user:password@host?query#fragment
[ uwh p  ] ------- nil --------
[ uwh p f] ------- nil --------
[ uwh pq ] ------- nil --------
[ uwh pqf] ------- nil --------
[ uwhr   ] //user:password@Host:123
[ uwhr  f] //user:password@Host:123#fragment
[ uwhr q ] //user:password@Host:123?query
[ uwhr qf] //user:password@Host:123?query#fragment
[ uwhrp  ] ------- nil --------
[ uwhrp f] ------- nil --------
[ uwhrpq ] ------- nil --------
[ uwhrpqf] ------- nil --------
[s       ] scheme:
[s      f] scheme:%23fragment
[s     q ] scheme:?query
[s     qf] scheme:?query%23fragment
[s    p  ] scheme:path
[s    p f] scheme:path%23fragment
[s    pq ] scheme:path?query
[s    pqf] scheme:path?query%23fragment
[s   r   ] scheme://:123
[s   r  f] scheme://:123#fragment
[s   r q ] scheme://:123?query
[s   r qf] scheme://:123?query#fragment
[s   rp  ] ------- nil --------
[s   rp f] ------- nil --------
[s   rpq ] ------- nil --------
[s   rpqf] ------- nil --------
[s  h    ] scheme://Host
[s  h   f] scheme://Host#fragment
[s  h  q ] scheme://host?query
[s  h  qf] scheme://host?query#fragment
[s  h p  ] ------- nil --------
[s  h p f] ------- nil --------
[s  h pq ] ------- nil --------
[s  h pqf] ------- nil --------
[s  hr   ] scheme://Host:123
[s  hr  f] scheme://Host:123#fragment
[s  hr q ] scheme://Host:123?query
[s  hr qf] scheme://Host:123?query#fragment
[s  hrp  ] ------- nil --------
[s  hrp f] ------- nil --------
[s  hrpq ] ------- nil --------
[s  hrpqf] ------- nil --------
[s w     ] scheme://:password@
[s w    f] scheme://:password@#fragment
[s w   q ] scheme://:password@?query
[s w   qf] scheme://:password@?query#fragment
[s w  p  ] ------- nil --------
[s w  p f] ------- nil --------
[s w  pq ] ------- nil --------
[s w  pqf] ------- nil --------
[s w r   ] scheme://:password@:123
[s w r  f] scheme://:password@:123#fragment
[s w r q ] scheme://:password@:123?query
[s w r qf] scheme://:password@:123?query#fragment
[s w rp  ] ------- nil --------
[s w rp f] ------- nil --------
[s w rpq ] ------- nil --------
[s w rpqf] ------- nil --------
[s wh    ] scheme://:password@Host
[s wh   f] scheme://:password@Host#fragment
[s wh  q ] scheme://:password@host?query
[s wh  qf] scheme://:password@host?query#fragment
[s wh p  ] ------- nil --------
[s wh p f] ------- nil --------
[s wh pq ] ------- nil --------
[s wh pqf] ------- nil --------
[s whr   ] scheme://:password@Host:123
[s whr  f] scheme://:password@Host:123#fragment
[s whr q ] scheme://:password@Host:123?query
[s whr qf] scheme://:password@Host:123?query#fragment
[s whrp  ] ------- nil --------
[s whrp f] ------- nil --------
[s whrpq ] ------- nil --------
[s whrpqf] ------- nil --------
[su      ] scheme://user@
[su     f] scheme://user@#fragment
[su    q ] scheme://user@?query
[su    qf] scheme://user@?query#fragment
[su   p  ] ------- nil --------
[su   p f] ------- nil --------
[su   pq ] ------- nil --------
[su   pqf] ------- nil --------
[su  r   ] scheme://user@:123
[su  r  f] scheme://user@:123#fragment
[su  r q ] scheme://user@:123?query
[su  r qf] scheme://user@:123?query#fragment
[su  rp  ] ------- nil --------
[su  rp f] ------- nil --------
[su  rpq ] ------- nil --------
[su  rpqf] ------- nil --------
[su h    ] scheme://user@Host
[su h   f] scheme://user@Host#fragment
[su h  q ] scheme://user@host?query
[su h  qf] scheme://user@host?query#fragment
[su h p  ] ------- nil --------
[su h p f] ------- nil --------
[su h pq ] ------- nil --------
[su h pqf] ------- nil --------
[su hr   ] scheme://user@Host:123
[su hr  f] scheme://user@Host:123#fragment
[su hr q ] scheme://user@Host:123?query
[su hr qf] scheme://user@Host:123?query#fragment
[su hrp  ] ------- nil --------
[su hrp f] ------- nil --------
[su hrpq ] ------- nil --------
[su hrpqf] ------- nil --------
[suw     ] scheme://user:password@
[suw    f] scheme://user:password@#fragment
[suw   q ] scheme://user:password@?query
[suw   qf] scheme://user:password@?query#fragment
[suw  p  ] ------- nil --------
[suw  p f] ------- nil --------
[suw  pq ] ------- nil --------
[suw  pqf] ------- nil --------
[suw r   ] scheme://user:password@:123
[suw r  f] scheme://user:password@:123#fragment
[suw r q ] scheme://user:password@:123?query
[suw r qf] scheme://user:password@:123?query#fragment
[suw rp  ] ------- nil --------
[suw rp f] ------- nil --------
[suw rpq ] ------- nil --------
[suw rpqf] ------- nil --------
[suwh    ] scheme://user:password@Host
[suwh   f] scheme://user:password@Host#fragment
[suwh  q ] scheme://user:password@host?query
[suwh  qf] scheme://user:password@host?query#fragment
[suwh p  ] ------- nil --------
[suwh p f] ------- nil --------
[suwh pq ] ------- nil --------
[suwh pqf] ------- nil --------
[suwhr   ] scheme://user:password@Host:123
[suwhr  f] scheme://user:password@Host:123#fragment
[suwhr q ] scheme://user:password@Host:123?query
[suwhr qf] scheme://user:password@Host:123?query#fragment
[suwhrp  ] ------- nil --------
[suwhrp f] ------- nil --------
[suwhrpq ] ------- nil --------
[suwhrpqf] ------- nil --------
15
Senseful